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Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : Erlang vulnerabilities (USN-8827-1)

critical Nessus Plugin ID 350965

Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8827-1 advisory.

 It was discovered that the Erlang Port Mapper Daemon did not properly handle slow connections. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2026-42792)

 It was discovered that Erlang incorrectly handled certain external term format data, leading to heap corruption. An attacker could possibly use this issue to cause Erlang to crash, resulting in a denial of service. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-55737)

 It was discovered that Erlang incorrectly handled invalid external term format data. An attacker could possibly use this issue to cause Erlang to crash, resulting in a denial of service. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-54890)

 It was discovered that Erlang incorrectly handled certain packet lengths, leading to a buffer overflow. A remote attacker could possibly use this issue to cause Erlang to crash or execute arbitrary code.
 (CVE-2026-75538)

 It was discovered that the Erlang Megaco flex scanner incorrectly handled certain input, leading to a buffer overflow. A remote attacker could possibly use this issue to cause Erlang to crash or execute arbitrary code. (CVE-2026-59250)

 It was discovered that Erlang TLS clients incorrectly accepted cipher suites that they had not offered. A remote attacker could possibly use this issue to intercept and modify TLS communications. (CVE-2026-55953)

 It was discovered that Erlang incorrectly handled certain certificate chains. A remote attacker could possibly use this issue to cause Erlang to use excessive resources, leading to a denial of service. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-58227)

 It was discovered that Erlang incorrectly handled certain certificate policies. A remote attacker could possibly use this issue to cause Erlang to use excessive resources, leading to a denial of service. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-59251)

 It was discovered that the Erlang HTTP server incorrectly handled certain conflicting HTTP framing headers. A remote attacker could possibly use this issue to smuggle HTTP requests. (CVE-2026-23941, CVE-2026-73812)

 It was discovered that the Erlang HTTP server incorrectly handled certain malformed chunk sizes. A remote attacker could possibly use this issue to cause Erlang to crash, resulting in a denial of service.
 (CVE-2026-69664)

 It was discovered that the Erlang HTTP server did not properly limit the size of chunked request bodies. A remote attacker could possibly use this issue to cause Erlang to use excessive resources, leading to a denial of service. (CVE-2026-74835)

 It was discovered that the Erlang HTTP server incorrectly handled certain equivalent request paths and differences in character case. A remote attacker could possibly use this issue to bypass authentication and gain unauthorized access. (CVE-2026-66835, CVE-2026-73270)

 It was discovered that the Erlang HTTP server did not properly limit simultaneous connections. A remote attacker could possibly use this issue to cause Erlang to use excessive resources, leading to a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-70399)

 It was discovered that the Erlang HTTP server incorrectly handled header continuation lines. A remote attacker could possibly use this issue to smuggle HTTP requests. (CVE-2026-66357)

 It was discovered that the Erlang HTTP server incorrectly handled certain malformed header names. A remote attacker could possibly use this issue to smuggle HTTP requests. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-73276)

 It was discovered that the Erlang HTTP server incorrectly handled incomplete request bodies. A remote attacker could possibly use this issue to cause Erlang to use excessive resources, leading to a denial of service. (CVE-2026-71380)

 It was discovered that the Erlang HTTP client did not properly limit the size of HTTP response headers. A malicious HTTP server could possibly use this issue to cause Erlang to use excessive resources, leading to a denial of service. (CVE-2026-55951)

 It was discovered that Erlang did not properly limit the length of port numbers when parsing URIs. A remote attacker could possibly use this issue to cause Erlang to use excessive resources, leading to a denial of service. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-59696)

 It was discovered that the Erlang SNMP application did not properly limit the size of certain integer values. A remote attacker could possibly use this issue to cause Erlang to use excessive resources, leading to a denial of service. (CVE-2026-70405)

 It was discovered that the Erlang LDAP client did not properly limit the length of port numbers in referral URLs. A malicious LDAP server could possibly use this issue to cause Erlang to use excessive resources, leading to a denial of service. (CVE-2026-70409)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-8827-1

Plugin Details

Severity: Critical

ID: 350965

File Name: ubuntu_USN-8827-1.nasl

Version: 1.2

Type: Local

Agent: unix

Published: 9/29/2026

Updated: 9/29/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.3

Percentile: 96.63

CVSS v2

Risk Factor: High

Base Score: 9.7

Temporal Score: 7.2

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:P

CVSS Score Source: CVE-2026-23941

CVSS v3

Risk Factor: Critical

Base Score: 9.4

Temporal Score: 8.2

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Critical

Base Score: 9.1

Threat Score: 6.9

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS Score Source: CVE-2026-55953

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:14.04:-:lts, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:erlang-appmon, p-cpe:/a:canonical:ubuntu_linux:erlang-asn1, p-cpe:/a:canonical:ubuntu_linux:erlang-base-hipe, p-cpe:/a:canonical:ubuntu_linux:erlang-base, p-cpe:/a:canonical:ubuntu_linux:erlang-common-test, p-cpe:/a:canonical:ubuntu_linux:erlang-corba, p-cpe:/a:canonical:ubuntu_linux:erlang-crypto, p-cpe:/a:canonical:ubuntu_linux:erlang-debugger, p-cpe:/a:canonical:ubuntu_linux:erlang-dialyzer, p-cpe:/a:canonical:ubuntu_linux:erlang-diameter, p-cpe:/a:canonical:ubuntu_linux:erlang-edoc, p-cpe:/a:canonical:ubuntu_linux:erlang-eldap, p-cpe:/a:canonical:ubuntu_linux:erlang-et, p-cpe:/a:canonical:ubuntu_linux:erlang-eunit, p-cpe:/a:canonical:ubuntu_linux:erlang-examples, p-cpe:/a:canonical:ubuntu_linux:erlang-ftp, p-cpe:/a:canonical:ubuntu_linux:erlang-gs, p-cpe:/a:canonical:ubuntu_linux:erlang-ic-java, p-cpe:/a:canonical:ubuntu_linux:erlang-ic, p-cpe:/a:canonical:ubuntu_linux:erlang-inets, p-cpe:/a:canonical:ubuntu_linux:erlang-jinterface, p-cpe:/a:canonical:ubuntu_linux:erlang-manpages, p-cpe:/a:canonical:ubuntu_linux:erlang-megaco, p-cpe:/a:canonical:ubuntu_linux:erlang-mnesia, p-cpe:/a:canonical:ubuntu_linux:erlang-mode, p-cpe:/a:canonical:ubuntu_linux:erlang-nox, p-cpe:/a:canonical:ubuntu_linux:erlang-observer, p-cpe:/a:canonical:ubuntu_linux:erlang-odbc, p-cpe:/a:canonical:ubuntu_linux:erlang-os-mon, p-cpe:/a:canonical:ubuntu_linux:erlang-parsetools, p-cpe:/a:canonical:ubuntu_linux:erlang-percept, p-cpe:/a:canonical:ubuntu_linux:erlang-pman, p-cpe:/a:canonical:ubuntu_linux:erlang-public-key, p-cpe:/a:canonical:ubuntu_linux:erlang-reltool, p-cpe:/a:canonical:ubuntu_linux:erlang-runtime-tools, p-cpe:/a:canonical:ubuntu_linux:erlang-snmp, p-cpe:/a:canonical:ubuntu_linux:erlang-src, p-cpe:/a:canonical:ubuntu_linux:erlang-ssh, p-cpe:/a:canonical:ubuntu_linux:erlang-ssl, p-cpe:/a:canonical:ubuntu_linux:erlang-syntax-tools, p-cpe:/a:canonical:ubuntu_linux:erlang-test-server, p-cpe:/a:canonical:ubuntu_linux:erlang-tftp, p-cpe:/a:canonical:ubuntu_linux:erlang-toolbar, p-cpe:/a:canonical:ubuntu_linux:erlang-tools, p-cpe:/a:canonical:ubuntu_linux:erlang-tv, p-cpe:/a:canonical:ubuntu_linux:erlang-typer, p-cpe:/a:canonical:ubuntu_linux:erlang-webtool, p-cpe:/a:canonical:ubuntu_linux:erlang-wx, p-cpe:/a:canonical:ubuntu_linux:erlang-x11, p-cpe:/a:canonical:ubuntu_linux:erlang-xmerl, p-cpe:/a:canonical:ubuntu_linux:erlang

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Exploit Ease: No known exploits are available

Patch Publication Date: 9/28/2026

Vulnerability Publication Date: 3/13/2026

Reference Information

CVE: CVE-2026-23941, CVE-2026-42792, CVE-2026-54890, CVE-2026-55737, CVE-2026-55951, CVE-2026-55953, CVE-2026-58227, CVE-2026-59250, CVE-2026-59251, CVE-2026-66357, CVE-2026-66835, CVE-2026-69664, CVE-2026-70399, CVE-2026-71380, CVE-2026-73270, CVE-2026-73276, CVE-2026-73812, CVE-2026-74835, CVE-2026-75538

IAVA: 2026-A-0309-S, 2026-A-0785-S, 2026-A-0928-S

USN: 8827-1